Olympiad Electrochem

What reaction occurs at the anode?

• Ag⁺ + e^- →Ag
• Ag → Ag⁺ + e^-
• Ni²⁺ + 2e^- → Ni
• Ni → Ni²⁺ + 2e^-

Tags

NGSS.HS-PS2-5

What element is being Oxidized?

• N
• H
• O
• S

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Reduction happens at the 

• anode
• cathode
• salt bridge
• voltmeter

Tags

NGSS.HS-PS2-5

This electrode loses mass 

• anode
• cathode

What coefficient would Fe⁺² have in the following reaction?
___ Al + ___ Fe⁺² → ___ Al⁺³ + ___ Fe

• 1
• 2
• 3
• 6

• Oxidized

• Reduced

Which of the following half reactions correctly represents a reduction half reaction?

• Fe →Fe²⁺ + 2e^-
• Pb⁴⁺ + 2e^- →Pb²⁺
• 2O^-2 →O₂ + 4e^-
• Fe + 3e^- →Fe³⁺

Which energy conversion shown below takes place in a voltaic cell?

• Electrical to chemical

• Mechanical to chemical

• Mechanical to electrical

• Chemical to electrical

In a voltaic cell the ions flow through the 

• wire
• salt bridge

In a voltaic cell electrons flow

• through the salt bridge

• from the cathode to the anode through the wire

• from the anode to the cathode through the wire

Answer explanation

Remember an ox chases a fat red cat!